Jason said: "It's set in Bristol. It's really impressive for a set. You walk through a sort-of warehouse, massive space, then you go through a door and there is what looks just like Sainsburys. It's huge, it's got 10 aisles, and I get very excited. Go wild in the aisles.

"If you took somebody in blindfolded, and took the blindfold off in the middle of the supermarket and looked round - it's a supermarket, and I think that helped because it was just real and believable."

Jane added: "I've done a lot of Tesco ads. I was a bit more jaded about it than the other members of the staff although the art department did a fantastic job.

"The velcro logo which was attached to a lot of the products looked very, very real. It was incredibly believable but the art department did a superb job."

The comedy - which also stars 'This is England's Chanel Cresswell and Rita May from 'Coronation Street' has been written and directed by 'Shameless' creators Paul Walker and Julie Rutterford.